Who is Robert OBrien, Trumps new pick for…

President Trump's newly named national security adviser, Robert O'Brien, replaces John Bolton, who left the White House last week. Here's what to know about O'Brien, the fourth person Mr. Trump has named to the position since…

Trump National Security Adviser pick: Robert OBrien named…

Trump announces new national security adviser President Trump has tapped Robert O'Brien to be his new national security adviser, replacing ousted former national security adviser John Bolton. O'Brien is currently the State Department's special presidential…

Sequoia National Park, home of the worlds largest…

In our summer series "American Wonders," "CBS This Morning" is exploring places that make America wonderful — from majestic natural landscapes to spectacular man-made creations. This week, CBS News foreign correspondent Jonathan Vigliotti explores Sequoia…